Stat-Talk #3

3 Ways to Tune Sample Sizes

Set Accuracy and Visitors

Select the MDE. Cap the False Positives. Pick Low-Variance Metrics.

Tuesday, February 10, 2026

10:00 AM EST

45 mins + 15 mins QnA

Topics

Tips to set the right MDE for your test

Picking low-variance metrics that save visitors.

Setting the accuracy by selecting the right alpha (false positive rate).

Understand one sided and two-sided tests.

Audience

This talk is for you if:

You do not have enough traffic to reach statistical significance.

Many of your winners revert back to mean after they have deployed.

You have been hearing about MDE and are unsure how to set it.

After this talk, you will have a practical understanding of setting the sample size for your tests.

Meet Your Mentor

Ishan Goel

Built the Stats Engine at VWO

Founder & Educator

Former Head of Data Science

Author

Trained 60 Leaders

Founder & Educator

Former Head of Data Science

Author

Trained 60 Leaders

Hi! I am a statistician, a teacher and the founder of Thinking Bell.

I am known for simplifying experimentation with analogies, doodles, and games that make decisions sharper and science practical.

I have led data science research at VWO and I have authored the VWO Stats Blog. In 2025, I taught a statistics bootcamp for a team of 60 marketers, product managers and data scientists.

Join me to master experimentation with clarity, depth, and fun.

Know More

Stat-Talk #3